From b2f5677499c3ea177447c789ce1d9c9f0e6ac5cc Mon Sep 17 00:00:00 2001
From: "weiliang.lin@intel.com" <weiliang.lin@intel.com>
Date: Fri, 19 Sep 2014 13:44:24 +0000
Subject: [PATCH] X87: Implement loads and calls from 'super'.

port r24078.

orginal commit message:
   Implement loads and calls from 'super'

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/581273007

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24089 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 src/x87/full-codegen-x87.cc | 101 +++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 91 insertions(+), 10 deletions(-)

diff --git a/src/x87/full-codegen-x87.cc b/src/x87/full-codegen-x87.cc
index ac55c28..94ccbcf 100644
--- a/src/x87/full-codegen-x87.cc
+++ b/src/x87/full-codegen-x87.cc
@@ -1275,6 +1275,25 @@ void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
 }
 
 
+void FullCodeGenerator::EmitLoadHomeObject(SuperReference* expr) {
+  Comment cnmt(masm_, "[ SuperReference ");
+
+  __ mov(LoadDescriptor::ReceiverRegister(),
+         Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
+
+  Handle<Symbol> home_object_symbol(isolate()->heap()->home_object_symbol());
+  __ mov(LoadDescriptor::NameRegister(), home_object_symbol);
+
+  CallLoadIC(NOT_CONTEXTUAL, expr->HomeObjectFeedbackId());
+
+  __ cmp(eax, isolate()->factory()->undefined_value());
+  Label done;
+  __ j(not_equal, &done);
+  __ CallRuntime(Runtime::kThrowNonMethodError, 0);
+  __ bind(&done);
+}
+
+
 void FullCodeGenerator::EmitLoadGlobalCheckExtensions(VariableProxy* proxy,
                                                       TypeofState typeof_state,
                                                       Label* slow) {
@@ -2225,6 +2244,21 @@ void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) {
 }
 
 
+void FullCodeGenerator::EmitNamedSuperPropertyLoad(Property* prop) {
+  SetSourcePosition(prop->position());
+  Literal* key = prop->key()->AsLiteral();
+  DCHECK(!key->value()->IsSmi());
+  DCHECK(prop->IsSuperAccess());
+
+  SuperReference* super_ref = prop->obj()->AsSuperReference();
+  EmitLoadHomeObject(super_ref);
+  __ push(eax);
+  VisitForStackValue(super_ref->this_var());
+  __ push(Immediate(key->value()));
+  __ CallRuntime(Runtime::kLoadFromSuper, 3);
+}
+
+
 void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) {
   SetSourcePosition(prop->position());
   Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate()).code();
@@ -2514,9 +2548,13 @@ void FullCodeGenerator::VisitProperty(Property* expr) {
   Expression* key = expr->key();
 
   if (key->IsPropertyName()) {
-    VisitForAccumulatorValue(expr->obj());
-    __ Move(LoadDescriptor::ReceiverRegister(), result_register());
-    EmitNamedPropertyLoad(expr);
+    if (!expr->IsSuperAccess()) {
+      VisitForAccumulatorValue(expr->obj());
+      __ Move(LoadDescriptor::ReceiverRegister(), result_register());
+      EmitNamedPropertyLoad(expr);
+    } else {
+      EmitNamedSuperPropertyLoad(expr);
+    }
     PrepareForBailoutForId(expr->LoadId(), TOS_REG);
     context()->Plug(eax);
   } else {
@@ -2555,6 +2593,7 @@ void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {
   } else {
     // Load the function from the receiver.
     DCHECK(callee->IsProperty());
+    DCHECK(!callee->AsProperty()->IsSuperAccess());
     __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0));
     EmitNamedPropertyLoad(callee->AsProperty());
     PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);
@@ -2567,6 +2606,42 @@ void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {
 }
 
 
+void FullCodeGenerator::EmitSuperCallWithLoadIC(Call* expr) {
+  Expression* callee = expr->expression();
+  DCHECK(callee->IsProperty());
+  Property* prop = callee->AsProperty();
+  DCHECK(prop->IsSuperAccess());
+
+  SetSourcePosition(prop->position());
+  Literal* key = prop->key()->AsLiteral();
+  DCHECK(!key->value()->IsSmi());
+  // Load the function from the receiver.
+  SuperReference* super_ref = callee->AsProperty()->obj()->AsSuperReference();
+  EmitLoadHomeObject(super_ref);
+  __ push(eax);
+  VisitForAccumulatorValue(super_ref->this_var());
+  __ push(eax);
+  __ push(Operand(esp, kPointerSize));
+  __ push(eax);
+  __ push(Immediate(key->value()));
+  // Stack here:
+  //  - home_object
+  //  - this (receiver)
+  //  - home_object <-- LoadFromSuper will pop here and below.
+  //  - this (receiver)
+  //  - key
+  __ CallRuntime(Runtime::kLoadFromSuper, 3);
+
+  // Replace home_object with target function.
+  __ mov(Operand(esp, kPointerSize), eax);
+
+  // Stack here:
+  // - target function
+  // - this (receiver)
+  EmitCall(expr, CallICState::METHOD);
+}
+
+
 // Code common for calls using the IC.
 void FullCodeGenerator::EmitKeyedCallWithLoadIC(Call* expr,
                                                 Expression* key) {
@@ -2727,15 +2802,21 @@ void FullCodeGenerator::VisitCall(Call* expr) {
 
   } else if (call_type == Call::PROPERTY_CALL) {
     Property* property = callee->AsProperty();
-    { PreservePositionScope scope(masm()->positions_recorder());
-      VisitForStackValue(property->obj());
-    }
-    if (property->key()->IsPropertyName()) {
-      EmitCallWithLoadIC(expr);
+    bool is_named_call = property->key()->IsPropertyName();
+    // super.x() is handled in EmitCallWithLoadIC.
+    if (property->IsSuperAccess() && is_named_call) {
+      EmitSuperCallWithLoadIC(expr);
     } else {
-      EmitKeyedCallWithLoadIC(expr, property->key());
+      {
+        PreservePositionScope scope(masm()->positions_recorder());
+        VisitForStackValue(property->obj());
+      }
+      if (is_named_call) {
+        EmitCallWithLoadIC(expr);
+      } else {
+        EmitKeyedCallWithLoadIC(expr, property->key());
+      }
     }
-
   } else {
     DCHECK(call_type == Call::OTHER_CALL);
     // Call to an arbitrary expression not handled specially above.
-- 
2.7.4